//
//  QSBGrayView.m
//
//  Copyright (c) 2006-2008 Google Inc. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//    * Redistributions of source code must retain the above copyright
//  notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above
//  copyright notice, this list of conditions and the following disclaimer
//  in the documentation and/or other materials provided with the
//  distribution.
//    * Neither the name of Google Inc. nor the names of its
//  contributors may be used to endorse or promote products derived from
//  this software without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
//  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
//  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
//  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
//  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
//  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
//  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
//  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
//  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
//  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
//  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//

#import "QSBGrayView.h"

@implementation QSBGrayView

- (BOOL)isOpaque {
  return NO;
}

- (void)lockFocus {
  // We clip to a view with rounded rects in the bottom, and square corners
  // up top.
  NSGraphicsContext *context = [NSGraphicsContext currentContext];
  [context saveGraphicsState];
  NSRect rect = [self bounds];
  NSBezierPath *path = [NSBezierPath bezierPath];
  NSPoint topLeft = NSMakePoint(NSMinX(rect), NSMaxY(rect));
  NSPoint topRight = NSMakePoint(NSMaxX(rect), NSMaxY(rect));
  NSPoint bottomRight = NSMakePoint(NSMaxX(rect), NSMinY(rect));
  
  [path moveToPoint:topLeft];
  [path appendBezierPathWithArcFromPoint:rect.origin
                                 toPoint:bottomRight
                                  radius:4.0];
  [path appendBezierPathWithArcFromPoint:bottomRight
                                 toPoint:topRight
                                  radius:4.0];
  [path lineToPoint:topRight];
  [path lineToPoint:topLeft];
  
  [path closePath];
  
  [path addClip];
  [super lockFocus];
  [context restoreGraphicsState];
}

- (void)drawRect:(NSRect)rect {
  [NSBezierPath clipRect:rect];
  [[NSColor whiteColor] setFill];
  NSRectFill(rect);
}    
@end
